The short answer
Find the studs or use the right anchor for the wall type, mark with a level, drill pilot holes, and load the shelf so weight sits over the fixings. Plasterboard alone holds almost nothing — the anchor does the work.
Shelves fail at the wall, not the bracket. Identify the wall type before you drill anything.
Step by step
- Identify the wall: knock for hollow plasterboard, solid thud for masonry.
- Use a stud finder or tap-and-probe to locate studs at 16" or 400mm centres.
- Check for cables and pipes with a detector — never drill blind above a socket or switch.
- Mark the first hole, drill a pilot, fit the fixing, and hang the bracket loosely.
- Set a spirit level across the bracket and mark the second hole from the level position.
- Use toggle or metal expansion anchors in plasterboard, plugs and screws in masonry.
- Load heaviest items directly over the brackets, not in the middle of the span.
What you need
- Drill and bits
- Spirit level
- Stud/cable detector
- Appropriate anchors
- Pencil
- Screwdriver
What it costs
| Item | Typical cost |
|---|---|
| Stud finder / detector | $20–$50 |
| Toggle anchors | $6–$12 per pack |
| Spirit level | $10–$25 |
| Drill hire | $15–$25 / day |
Common questions
How much can plasterboard hold?
With good toggle anchors, roughly 20–25kg per fixing. With plastic plugs, almost nothing.
Where are cables?
Usually in vertical and horizontal zones from sockets and switches. Avoid those zones.
Shelf sagging?
Span too long. Add a bracket every 60–75cm.